Finding the Fourth Proportional to 13,286,949.60, 18,335,990.40 and 7,175,377.68
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Solution
The fourth proportional to 13,286,949.60, 18,335,990.40 and 7,175,377.68 is: 9,902,021.17
Step by Step Solution
- Step 1: Write the proportion equation
13,286,949.60 : 18,335,990.40 = 7,175,377.68 : x - Step 2: Convert to fraction form
13,286,949.60/18,335,990.40 = 7,175,377.68/x - Step 3: Cross multiply
13,286,949.60x = 18,335,990.40 × 7,175,377.68 - Step 4: Simplify right side
13,286,949.60x = 131,567,656,256,854.25 - Step 5: Solve for x
x = 131,567,656,256,854.25/13,286,949.60 - Step 6: Final answer
x = 9,902,021.17
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.